Self-Insured Retention vs Deductible

A self-insured retention (SIR) is money you pay yourself, for defense and damages, before a liability policy starts paying. A deductible runs the other direction. The insurer handles the claim and pays it from the first dollar, then sends you a bill for the deductible. Either way, you end up paying the same first slice of the loss. What changes is who pays first, who runs the defense, and who's stuck if the money isn't there.

You'll run into this most in the markets Menlo works in. Umbrella and excess policies, surplus lines general liability and bigger professional liability programs often use SIRs where small-business policies use deductibles. Below we put the two side by side, run one claim through both, then cover how the SIR on an umbrella works and what to negotiate before you sign. For the one-paragraph definition, see our glossary entry on self-insured retention.

Self-Insured Retention (SIR)

A self-insured retention is a dollar amount stated in a liability policy that the insured must pay before the policy responds to a loss. Until the retention is reached, the insured pays the defense and indemnity costs; after that, the insurer pays the covered amounts above it.

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What is the difference between a self-insured retention and a deductible?

It comes down to where the insurer stands in the claim. IRMI defines an SIR as an amount "that must be paid by the insured before the insurance policy will respond to a loss." Under a deductible, by contrast, "the insurer pays the defense and indemnity costs associated with a claim on the insured's behalf and then seeks reimbursement."^[1] Here's how they compare, point by point.

How the two structures typically work on a liability claim. Your policy wording controls.
	Deductible	Self-insured retention (SIR)
Who pays the first dollars	Insurer pays, then bills you back	You pay until the retention is used up
Who handles the claim at the start	Insurer, from first notice	You or your claims administrator, inside the retention
Defense costs	Paid by the insurer; whether they count toward the deductible depends on the form	Usually yours inside the retention
Effect on the policy limit	Usually not taken out of the limit	Limit usually sits above the retention
If you cannot pay your share	Insurer has already paid the claimant; it is left collecting from you	Claimant may go unpaid inside the retention; insurer's duty depends on the wording
What the insurer checks	Your ability to repay (often security)	Your ability to fund and manage claims
Where you usually see it	Small business GL, property, auto	Umbrella and excess, surplus lines GL, larger professional liability and casualty programs

How does the money flow on the same claim?

Take one made-up liability claim that costs 200,000 in defense and settlement. Compare a policy with a 50,000 deductible and a policy with a 50,000 SIR. These are round example figures, not a quote.

Step	With a 50,000 deductible	With a 50,000 SIR
Claim reported	Insurer opens the file and appoints defense counsel	You (or your administrator) open the file and fund defense
First 50,000 of cost	Insurer pays it	You pay it
Remaining 150,000	Insurer pays it	Insurer pays it, once you show the retention was spent
After the claim closes	Insurer bills you 50,000	Nothing more to bill
Your total cost	50,000	50,000

You pay the same total. The timing, the control and the risk are different. With a deductible, you get a bill after the claim. With an SIR, you're writing the checks and running the defense while the claim is open. IRMI notes that for a deductible, "Usually, the amount of the deductible is not subtracted from policy limits," while a policy with an SIR usually starts its limit above the retention.^[2]^[1] Check your own policy on both. Some forms let defense costs eat into the limit, and some deductibles only apply to damages.

Who controls the defense under an SIR?

Usually you do, inside the retention, within the insurer's rules. You're paying defense and indemnity costs until you reach the SIR,^[1] so you normally fund the defense and often run it. How much room the insurer gives you depends on the policy. Expect rules about reporting serious claims early, getting the insurer's OK before you settle near the retention, and keeping claim records the insurer can audit. Before you bind, check the SIR endorsement for these:

What counts toward the SIR? Does the policy count only what you paid yourself? Or do payments from another insurer, an additional insured's carrier or a subcontractor's carrier count too?
Notice. Which claims do you have to report even while they're still inside the retention?
Settlement consent. Can you settle within the retention without asking, and what happens if you settle above it without consent?
Defense costs. Do they count toward the SIR, and do they reduce the limit once the insurer is paying?

What happens if the insured cannot pay the SIR?

This is where an SIR gets risky, and the risk cuts two ways. With a deductible, the insurer pays first and has to collect from you later. That's why a large deductible may need to be backed by security.^[4] With an SIR, the injured claimant is the one exposed: the first layer of what they recover depends on whether you can pay.

California sets one floor. Insurance Code section 11580 says a liability policy issued in the state must provide "that the insolvency or bankruptcy of the insured will not release the insurer" from paying for injury or damage during the policy period. It also lets a claimant with a judgment against the insured sue the insurer on the policy, "subject to its terms and limitations."^[3] So your policy doesn't die if you go bankrupt. That alone doesn't make the insurer pay the retention, or "drop down" into it. Whether the insurer steps in when you can't fund the SIR depends on the policy wording, so get that wording in writing. Lenders and project owners who require your insurance often ask the same question in their contracts.

Workers' comp shows the contrast best. California won't let a workers' comp deductible leave an injured worker unpaid. A deductible endorsement must say the insurer pays all benefits "notwithstanding the deductible," and that any amount inside the deductible is an advance you must repay.^[4] That's why big workers' comp programs use a large deductible plan, where the insurer handles the claims and bills you back, instead of a true SIR.^[5]

How does a self-insured retention work on an umbrella policy?

On a commercial umbrella, the SIR applies to claims the umbrella covers and your underlying policies don't. IRMI says an umbrella does three jobs. It adds limits above the underlying policies. It "drops down" when an underlying aggregate limit is used up. And it covers some claims the underlying policies exclude, "subject to the assumption by the named insured of a self-insured retention."^[6] The drop-down provision is the clause that lets the umbrella sit over underlying aggregate limits that have been reduced or used up. When they drop down, some umbrellas keep their own terms and others follow the primary policy.^[7]

So on an ordinary claim your general liability or auto policy pays, the umbrella SIR never comes into play. It only applies in the gap, where the umbrella covers more than the policies under it. Our guide to umbrella vs excess liability explains why a follow-form excess policy has no such gap. For quotes above a general liability policy, see commercial excess and umbrella coverage.

There's a cousin called the corridor SIR, sometimes called a "bikini deductible." It's a self-insured layer between a primary layer and the excess layer above it. People use it to bring down the cost of excess or umbrella insurance, or to get it at all.^[8]

Where do self-insured retentions show up?

You'll see SIRs most often in four places:

Umbrella and excess liability, on claims the umbrella covers but the underlying policies do not (see above).
Surplus lines general liability for contractors, habitational and other hard-to-place risks. When you get a surplus lines quote, ask whether it uses an SIR or a deductible. They play out differently once a claim comes in. Our guide to surplus lines insurance explains that market.
Professional liability for firms with larger revenue, where a retention often includes defense costs. See what professional liability insurance covers.
Large-account casualty programs, where the insured has a claims administrator and the cash to fund losses.

What are the pros and cons of an SIR?

Choosing an SIR over a deductible

Benefits

Lower premium, because the insurer does not pay or handle the first layer of each claim
Control over defense counsel and early settlement inside the retention
No bill-back after the claim; you pay as you go
Can open access to umbrella or excess limits that would otherwise be declined or priced higher

Risks

You need cash available during the claim, not after it
You carry the cost of claims handling, or of hiring a third-party administrator
Disputes over what counts toward the retention can delay the insurer's payment
An unfunded retention can hurt your standing with lenders, project owners and claimants

Is self-insuring worth it?

It's worth it if you can predict the retained layer and pay for it. Retention means any way of keeping risk yourself, from deductibles all the way to formal self-insurance.^[9] If your business has steady, frequent small claims and the cash to pay them, keeping that layer often saves money. If your worst year would wipe out your cash, it usually doesn't. In California, fully self-insuring workers' comp is a regulated status. You can't just decide to keep the risk. You need a certificate of consent to self-insure from the Director of Industrial Relations.^[10]

What should you negotiate on an SIR?

Before you take a retention, get straight answers on these:

The amount, per claim and in total. Is there an annual aggregate that caps your total retained cost across all claims?
Defense costs. Are they inside the SIR, and do they erode the limit above it?
Who can satisfy the SIR? Only you, or also other insurers and contractual indemnitors?
Insolvency wording. What does the insurer do if you cannot fund the retention?
Claims handling standards: reporting thresholds, approved counsel and consent to settle.
Premium credit. What does the SIR save you compared with a deductible of the same size? Your broker should show you both options.

Frequently asked questions

What does self-insured retention mean on an umbrella policy?

It's what you pay on a claim the umbrella covers but your underlying policies don't. If your general liability or auto policy covers the claim, the umbrella sits on top and there's no SIR. The SIR only kicks in where the umbrella is broader than the policies below it.

Does a self-insured retention reduce the policy limit?

Usually not. The limit normally sits above the retention, so once you've paid the SIR the insurer's full limit is there. The defense cost wording can change that. If defense costs are inside the limit, they cut into what's left for damages.

Can another insurer's payment satisfy my SIR?

Only if your policy says so. Some SIR endorsements count only payments from the named insured. Others accept payments from other insurers or indemnitors. That wording often decides whether an additional insured's carrier can fund the retention for you, so check it before you bind.

What are the disadvantages of self-insuring?

You need cash on hand while the claim is open, you pay to handle claims, and a bad year lands straight on your balance sheet. You also take on collection and credit risk that, with a deductible, stays with the insurer until it bills you. An SIR fits a business that can fund and manage claims. It doesn't fit one that a single large loss would hurt.

This guide is for educational purposes and summarizes common policy practice, IRMI definitions and California statutes. Your policy's specific terms, conditions and endorsements control. Menlo Insurance Services is a licensed California insurance broker (license 6020106) and may earn a commission on policies it places. Talk to a licensed broker about your actual exposures.

The Bottom Line

On a given claim, a deductible and a self-insured retention can cost you exactly the same. What differs is who pays first and who runs the claim. With a deductible, the insurer defends and pays, then bills you. With an SIR, you pay defense and damages until the retention runs out, and the insurer pays above it. Pick an SIR if you can fund and manage that layer. Before you sign, get three things in writing: what counts toward the retention, whether defense costs eat into the limit, and what the insurer does if you can't pay.